P4 to Git Change 1213734 by yaxunl@yaxunl_stg_win50 on 2015/11/23 11:02:59

SWDEV-82054 - [CQE OCL][QR][LNX] RQ Conformance "Integer_Ops" test is crashing on CPU; Faulty CL#1206023.

	In llvm32 by default llvm::DisablePrettyStackTrace is off, which causes a trap handler installed by default and interferes with the trap handler in runtime, causing unhandled SIGFPE exceptions when executing conformance/integer_ops on certain cpu.

	To fix this, put stack trace duping under an env var AMD_DUMP_STACK_TRACE and set llvm::DisablePrettyStackTrace=true by default.

	Here env var is used because there is still no elf binary at this stage to pass the compiler option to if_aclCompilerInit.

Affected files ...

... //depot/stg/opencl/drivers/opencl/compiler/legacy-lib/backends/common/v0_8/if_acl.cpp#8 edit
... //depot/stg/opencl/drivers/opencl/compiler/lib/backends/common/v0_8/if_acl.cpp#86 edit


[ROCm/clr commit: ccc2b4ce79]

projects/clr/rocclr/compiler/lib/backends/common/v0_8/if_acl.cpp

@@ -96,10 +96,11 @@ if_aclCompilerInit(aclCompiler *cl, aclBinary *bin,
 #endif
                                    ));
   }
-#ifndef NDEBUG
-  llvm::EnablePrettyStackTrace();
-  llvm::sys::PrintStackTraceOnErrorSignal();
-#endif
+  static const char *DumpStackTrace = getenv("AMD_DUMP_STACK_TRACE");
+  if (DumpStackTrace) {
+    llvm::EnablePrettyStackTrace();
+    llvm::sys::PrintStackTraceOnErrorSignal();
+  }
   // Initialize targets first.
   llvm::InitializeAllTargets();